Fantasy hit list: I gave up on Terry Goodkind around the third Sword of Truth book (like the TV series though). What finally did me in was the blatant misogyny. I mean, I like to objectify women and all, but this was ridiculous. The main girl, Kahlan, is about to be gang-raped in a dank prison and she thinks that if he boyfriend could do it, then so could she. But the thing is that her boyfriend wasn't gang raped. He had hot bondage sex with a sexy dominatrix. Instead of thinking "I can't believe my boyfriend cheated on me and yet I'm the one who gets prison raped", she thinks, "Oh this won't be as bad as that time my boyfriend totally got it on with all those leather-clad chicks" So I don't see how vioilent prison rape could possibly be compared to hot S&M action. Pissed me off and I stopped reading.
The next is Piers Anthony. I read one book by him and I wanted to punch him in the face. Tip: everyone hates puns. Basing an entire muli-volume fantasy series based solely on puns is not a good idea.
I'd also throw Terry Brooks on there but not with as much hate. I just found his first series (Shanara something or another) to be a dull, step by step Tolkien rip off.
After that I don't suppose I've read anything that just turned me sour, but I have read a lot of dull, cliched stuff.